Weft-moistening shuttle.



E. PREIN.

WEFT' MOISTENING SHUTTLE.

APPLIOATION'FILBD MAY 18, 1911.

1 101 712 Patented June 30,1914.

9220612 far fif'i'neases: 4 %M f 46m 2} ,ver 117027263 COLUMBIAPLANOGRAPH co., WASHINGTON, D. c.

TABS

EMIL PREIN, 0F HANOVER, GERMANY, ASSIGNOR IO THE FIRM 0F PREIN-GEWEBEACTIEN-GESELLSOI-IAFT, OF HANOVER-LINDEN, GERMANY.

WEFT-IVIOISTENING SHUTTLE.

Patented June 30, 19141..

Original application filed September 9, 1910, Serial No. 581,200.Divided and this application filed May 18,

To all whom it may concern:

Be it known that I, EMIL Pnnnv, mechanical engineer, a subject of theGerman Emperor, residing at Am Bokemahl 10 Hanover, Germany, haveinvented new and useful Improvements in Weft-Moistening Shuttles, ofwhich the following is a specification.

The subject of the present invention is divided from the applicationdated September 9th, 1910, Serial No. 581,200, of which it originallyformed a part.

As is well known, during the weaving of fabrics the fibers become loosefrom the yarn, even when they have been first connected together by somepreparation or are woven by the wet process. In the case of the fibersof the warp yarn, this takes place owing to the strong mutual frictionduring the formation of the shed and to the reciprocation of the reed;in the case of the fibers of the weftyarn, owing to the sudden cessationof the adhesion between the fibers caused during the picking of the weftand by the very rapid unwinding of the yarn and by the attractionbetween the yarn remaining on the shuttle and that which is beingunwound. The fibers which are then still projecting from the surface ofthe fabric are removed by shearing, singeing and cleaning machines inorder to make the fabric suitable for various purposes. In this way thefabric loses not only a large number of fibers which would otherwiseofier great resistance to tearing, but the weaving in of fibers whichtend to become loose, and the violent removal of those which project,results in serious drawbacks. Durmg shearing, the very sharp cutterswhich work at high speed not only remove the projecting fibers but alsoout little knots and threads off, which damage is not at firstnoticeable and only shows unfavorable results when the fabric is testedas to its resistance to tearing as a completed length. In the singeingprocess it is the heat, generally acting suddenly on the fabric, whichmakes all the fibers brittle, more particularly the single cell cottonfibers. A further important drawback is that the fibers which have beenwoven in a curved and crushed state, remain in the fabric with aspreading force which has not been weakened in any way. If the wovenmaterial is treated later Serial No. 528,079.

on for any technical purpose the fibers become loose and project fromthe fabric as the spreading forces of the fibers and the adhering forcesof the preparation act in opposition to each other. Even if the curvedfibers and hairs are held during drying by mechanical pressure, which,as is well known in practice, is carried out in different ways invarious fabrics, according to the purpose for which they are intended,they are merely held fast but not weakened. They will also in this casegradually become loose and detached from their bed owing to theirregular movement of the fabric, changeable tem perature and varyingstrains set upon the fabric with disadvantageous results.

The process and the apparatus of the present invention hereinafterdescribed, is in tended to avoid the drawbacks in question. This processis characterized in that the weft threads are rubbed with a moistenedpad or the like immediately before being woven into the fabric, in suchmanner that all fibers are caused to adhere straightened to theirthreads, in which position they are held by the threads when woventogether. It is therefore of especial importance that the laying down ofthe fibers takes place exactly at the place where, and at the momentwhen no further fiber loosening forces are brought to operate on thethreads. As a material for laying down the fibers, moistened rubbersponge may for instance be used.

The invention may be carried out in a variety of ways.

One construction of apparatus according to this invention is illustratedin the accompanying drawing.

The shuttle a may be of any well known construction, but preferablyslightly longer as it has to contain several parts in addition to thoseit normally carries. It has two compartments g) in which is arranged apad 7;. One space p through which the thread leaving the cop 8 mustpass, is adjacent to a liquid chamber 1", from which it is onlyseparated by a perforated plate 9. The pad i in this space is thereforealways kept moist. The pad 6 in the second space is not directlymoistened by the liquid but serves to complete the drawing out andlaying down of the moistened fibers on the threads. The threads are ledfrom the cops 8 through eyes fulfilsmodern requirements, where it is imz? in the sides of the spaces p. In order to enable the thread to bepassed through the pads 2' these are divided so that the parts may beseparated when the shuttle is opened, and the thread passed through theholes. The weaving isefiected in the usual man ner. The picking of theweft threads is also effected in the well known manner. During thepassage of the shuttle 2 through the shed, the liquid from the chamber ris shaken up by the striking of the driver and thereby passes throughthe perforated plate q and into the space 9. At the same time the yarnruns from the cop 8 through eyes into the two superimposed compartments2) and through the pads 2'. In the first space the fibers projectingfrom the threads are moistened and are also slightly rubbed; in thesecond space the fibers receive a final rubbing so that all the fibersare laid down on the thread. Immediately the thread leaves the shuttle,that is at the instant when the fibers are adhering firmly to thethread, it is caught between the warp threads and held fast, so that thefibers can no longer free themselves. dried the fibers are hold fast.-The fabric thus manufactured is better able to resist mechanical strainsthan that manufactured in the usual manner and more particularly portantto have a smooth fabric as, for instance, those used in the manufactureof balloon fabrics.

What I claim is:

1. In an apparatus for treating the weft threads of a fabric, thecombination of a shuttle for throwing said threads, and a moistened padmounted upon said shuttle for laying down the projecting fibers in onedirection along said weft threads, immediately before the latter leavethe shuttle.

2. An apparatus for treating the weft threads of a fabric immediatelybefore they are interwoven, consisting of a hollow shuttle, a padcarried by said shuttle, means for keeping said pad moist, and meanswhereby When the woven material is,

the weft thread is passed along the pad in one direction to lay down theprojecting fibers.

3. An apparatus for the production of woven fabrics in which theprojecting fibers are straightened out on the weft threads consisting ofa shuttle, a moistened pad on said shuttle, a chamber carrying liquidand means whereby the moistened pad is rubbed against the weft threads.

4. An apparatus for the production of woven fabrics in which theprojecting fibers are straightened out on the weft threads,

said shuttle, a chamber containing liquid, a

perforated plate separating the pad from the liquid, a second pad, andmeans for guiding the weft thread through the two pads.

-6. An apparatus for the production or woven fabrics in which theprojecting fibers are straightened out and laid down on the weftthreads, consisting of the combination of a shuttle with suitablydisposed eyes, a

moistened pad carried by said shuttle, a

chamber containing liquid, a perforated plate separating said pad fromthe liquid in said chamber, and a second pad so disposed in said shuttlethat the weft thread is directed by the eyes in the shuttle through thetwo pads and out of the'shuttle.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' EMIL r nnin.

. copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G. v

